remove unneeded local var

src/app.js

@@ -407,15 +407,14 @@ Please make a backup of your contracts and start using http://remix.ethereum.org
   // ----------------- Tx listener -----------------
   var transactionReceiptResolver = new TransactionReceiptResolver()
 
-  var compiledContracts = function () {
+  var txlistener = new Txlistener({
+    api: {
+      contracts: function () {
         if (self._components.compiler.lastCompilationResult && self._components.compiler.lastCompilationResult.data) {
           return self._components.compiler.lastCompilationResult.data.contracts
         }
         return null
-  }
-  var txlistener = new Txlistener({
-    api: {
-      contracts: compiledContracts,
+      },
       resolveReceipt: function (tx, cb) {
         transactionReceiptResolver.resolve(tx, cb)
       }